Breaking Language Barriers in Visual Language Models via Multilingual Textual Regularization

Fuente: arXiv
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Autores principales: Pikabea, Iñigo, Lacunza, Iñaki, Pareras, Oriol, Escolano, Carlos, Gonzalez-Agirre, Aitor, Hernando, Javier, Villegas, Marta
Formato: Preprint
Publicado: 2025
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author Pikabea, Iñigo
Lacunza, Iñaki
Pareras, Oriol
Escolano, Carlos
Gonzalez-Agirre, Aitor
Hernando, Javier
Villegas, Marta
author_facet Pikabea, Iñigo
Lacunza, Iñaki
Pareras, Oriol
Escolano, Carlos
Gonzalez-Agirre, Aitor
Hernando, Javier
Villegas, Marta
contents Rapid advancements in Visual Language Models (VLMs) have transformed multimodal understanding but are often constrained by generating English responses regardless of the input language. This phenomenon has been termed as Image-induced Fidelity Loss (IFL) and stems from limited multimodal multilingual training data. To address this, we propose a continuous multilingual integration strategy that injects text-only multilingual data during visual instruction tuning, preserving the language model's original multilingual capabilities. Extensive evaluations demonstrate that our approach significantly improves linguistic fidelity across languages without degradation in visual performance. We also explore model merging, which improves language fidelity but comes at the cost of visual performance. In contrast, our core method achieves robust multilingual alignment without trade-offs, offering a scalable and effective path to mitigating IFL for global VLM adoption.
format Preprint
id arxiv_https___arxiv_org_abs_2503_22577
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Breaking Language Barriers in Visual Language Models via Multilingual Textual Regularization
Pikabea, Iñigo
Lacunza, Iñaki
Pareras, Oriol
Escolano, Carlos
Gonzalez-Agirre, Aitor
Hernando, Javier
Villegas, Marta
Computer Vision and Pattern Recognition
Artificial Intelligence
Rapid advancements in Visual Language Models (VLMs) have transformed multimodal understanding but are often constrained by generating English responses regardless of the input language. This phenomenon has been termed as Image-induced Fidelity Loss (IFL) and stems from limited multimodal multilingual training data. To address this, we propose a continuous multilingual integration strategy that injects text-only multilingual data during visual instruction tuning, preserving the language model's original multilingual capabilities. Extensive evaluations demonstrate that our approach significantly improves linguistic fidelity across languages without degradation in visual performance. We also explore model merging, which improves language fidelity but comes at the cost of visual performance. In contrast, our core method achieves robust multilingual alignment without trade-offs, offering a scalable and effective path to mitigating IFL for global VLM adoption.
title Breaking Language Barriers in Visual Language Models via Multilingual Textual Regularization
topic Computer Vision and Pattern Recognition
Artificial Intelligence
url https://arxiv.org/abs/2503.22577